Wind is the main climatic factor in spring. That is why wind tends to cause disease in spring. But in other seasons wind also can cause disease. Wind is characterized by the following features:

Wind is a pathogenic factor of yang nature, characterized by floating and dispersion because of lightness. That is why wind attacks the upper part (the head and face) and skin first when it invades the body. So the disease caused by wind mainly involves the surface of the body, the head and the face with the manifestations of headache, running nose, sweating and aversion to cold, etc.

Wind is mobile and the disease caused by it is also migration (such as migratory pain of limbs in wind-bi syndrome), tremor of the limbs (such as convulsion, spasm due to some special pathogenic factors of wind) and dizziness (such as subjective feeling of shaking or faintness or like sitting in a boat or car). Dizziness is usually caused by dysfunction of the viscera complicated by liver-wind. Exogenous pathogenic wind is often the factor that induces endogenous wind.

Wind tends to change. So the disease caused by wind is often characterized by sudden onset, immediate transmission and change as well as fast healing. For example, rubella is marked by quick fluctuation of cutaneous pruritus without a fixed location.

Since it is easier for wind to attack the body, other factors in the six exogenous factors often attach themselves to wind when they invade the body, frequently leading to exogenous wind-cold syndrome, exogenous wind-heat syndrome, exogenous, wind-dampness syndrome and exogenous wind-dryness syndrome. That is why TCM holds that "wind is the leading one among the six exogenous pathogenic factors", "all diseases are caused by wind" and " wind is the leading cause of all diseaes".